High-precision turning equipment and method for ultra-deep well drill rod

Abstract

The invention relates to the technical field of drill rod turning, and discloses high-precision turning equipment and method for an ultra-deep well drill rod, and the high-precision turning equipment comprises a lathe, an abutting assembly, a positioning part, a driving part, a turning part, a cooling part and a detection part; two positioning pieces are slidably connected in the lathe in the length direction, a drill rod is clamped between the two positioning pieces, a driving piece is arranged in the middle of the lathe and used for driving the positioned drill rod to rotate, a turning piece and a cooling piece are arranged at the two ends of the lathe respectively, and a detection piece is arranged between the two positioning pieces. The multiple abutting assemblies are distributed on the outer side of the drill rod in the circumferential direction. The lathe, the turning part, the cooling part, the positioning part and the detection part are utilized, the drill rod is turned, meanwhile, the straightness of the drill rod can be detected, marking in the later period is facilitated, fixed-point straightening operation is facilitated, and therefore the quality of the drill rod is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of drill pipe turning processing, and in particular to a high-precision turning processing device and method for ultra-deep well drill pipes. Background Art

[0002] The drilling depth of ultra-deep wells can reach more than 10,000 meters (such as the Deep Earth Tako 1 well reaching 10,910 meters and the Kola ultra-deep borehole reaching 12,262 meters), facing extreme conditions such as high temperature (above 300°C), high pressure (mud pressure in the well exceeding 175MPa), high ground stress and corrosive media (such as hydrogen sulfide and carbon dioxide). In order to reduce the load of the drilling rig and increase the drilling depth, lightweight and high-strength materials (such as aluminum alloy, titanium alloy, and carbon fiber composite materials) have become the mainstream choice.

[0003] Straightness is one of the most basic shape tolerances in geometric tolerances. It is used to measure the degree of deviation between the actual straight line and the ideal straight line. Straightness refers to the variation of the actual measured straight line relative to the ideal straight line. It belongs to the category of shape tolerance. Its core function is to limit the bending, inclination and other irregular deformations of the part surface or axis, and ensure the straightness of geometric elements. Drill rods with excessive straightness will produce violent vibrations when rotating at high speed, resulting in uneven contact between the drill bit and the hole wall, accelerating the wear of the cutting edge, deviation of the drilling trajectory, and reduction of the hole quality.

[0004] Therefore, in order to ensure that the ultra-deep well drill pipe can also perform real-time detection of its own straightness during turning, and timely record and feedback of the drill pipe straightness, so as to facilitate precise straightening in the later stage to ensure the quality of the drill pipe, a high-precision turning processing equipment and method for ultra-deep well drill pipe is proposed. Summary of the invention

[0005] In order to solve the technical problems raised in the background technology, the present invention provides a high-precision turning processing equipment and method for ultra-deep well drill pipes.

[0006] The present invention is implemented by the following technical scheme: a high-precision turning processing equipment for ultra-deep well drill pipes, including a lathe, an abutment assembly, a positioning part, a driving part, a turning part, a cooling part and a detection part.

[0007] Among them, there are two positioning parts slidingly connected along the length direction of the lathe, the two positioning parts are used to clamp the drill rod, and a driving part is arranged in the middle of the lathe to drive the positioned drill rod to rotate. Turning parts and cooling parts are respectively arranged at both ends of the lathe, and a detection part is arranged between the two positioning parts.

[0008] Abutment components, a plurality of abutment components are provided and circumferentially distributed on the outside of the drill rod, and the abutment components can abut against the annular outer wall of the drill rod to rotate synchronously with the drill rod.

[0009] When the abutment assembly rotates, the detection member is driven to slide along the length direction of the drill rod to detect the straightness of the outer wall of the drill rod.

[0010] As a further improvement of the above scheme, the lathe includes a base, with an operating box 1 and an operating box 2 respectively provided on both sides of the base, the longitudinal section of the base is U-shaped, and the top of the base is configured to be bent outward, a horizontal plate is fixedly connected to one side above the base, and the two sides of the horizontal plate are respectively connected to the operating box 1 and the operating box 2, wherein one side of the operating box 1 and the operating box 2 are both provided with a circular hole, and the two circular holes are coaxially arranged, and a conveying device is provided outside the operating box 1 to convey the drill rod.

[0011] As a further improvement of the above scheme, the driving member includes a positioning plate, which is fixed at the middle of the base, the positioning plate is perpendicular to the length direction of the base, and the positioning plate is arranged parallel to the bottom surface of the base. A hydraulic rod 1 is fixed to the top of the positioning plate, and a support rod is connected to the top of the hydraulic rod 1. A driving wheel is installed at the end of the support rod for driving the drill rod to rotate.

[0012] As a further improvement of the above scheme, the positioning member includes a sliding frame, a positioning block is fixedly connected to the middle of the sliding frame, a circular through hole is opened in the middle of the positioning block, and the two sides of the bottom end of the sliding frame are slidably connected to the two sides of the top end of the base, wherein the sliding frame slides along the length direction of the base, and the positioning block has a plurality of holes opened along the circumference of the circular through hole, each hole is arranged radially along the circular through hole, and the number of holes is at least three, a sleeve is coaxially connected to one end of the hole, and one of the holes is arranged above the positioning block.

[0013] As a further improvement of the above scheme, each hole is fixed with a vertical bar, and the vertical bar is parallel to the center line of the hole, a slide tube is provided in the hole, and a side groove which is slidably connected to the vertical bar is opened on the side wall of the slide tube, the inner end of each slide tube is rotatably connected to a rotating rod 1, and a rotating wheel is coaxially fixed on the rotating rod 1, the tread of each rotating wheel can abut against the outer wall of the drill rod, and the rotation center line of the rotating wheel is parallel to the center line of the drill rod, and when the drill rod rotates, the friction between it and the tire tread of the rotating wheel is used to drive the rotating wheel to rotate.

[0014] As a further improvement of the above scheme, a rotary groove is opened in the positioning block, and the rotary groove is connected to the hole, a rotating block is rotatably connected in the rotary groove, and an inner gear ring is fixedly connected to the rotating block facing the side of the slide cylinder, a plurality of positioning sleeves are evenly and fixedly connected in the rotary groove, and a rotating shaft is rotatably connected to the middle part of each positioning sleeve, and a gear 1 is coaxially fixedly connected to one end of the rotating shaft, and the gear 1 is meshingly connected to the inner gear ring, wherein the number of positioning sleeves is consistent with the number of holes, and the other end of each rotating shaft is coaxially fixedly connected to a gear 2, and one side of each gear 2 is meshingly connected to a rack plate, and each rack plate is fixed to the outer wall of the slide cylinder for driving the slide cylinder to abut against the outer wall of the drill rod.

[0015] As a further improvement of the above scheme, a hydraulic rod 2 is fixedly connected to the slide cylinder at the top, a connecting plate is fixedly connected to the top of the hydraulic rod 2, a sliding groove is provided at the bottom end of the other side of the connecting plate, a sliding bar is slidably connected to the sliding groove, the sliding bar is installed on the top of the cross plate, and the sliding direction of the sliding bar and the sliding groove is consistent with the length direction of the base.

[0016] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0017] As a further improvement of the above scheme, a movable cavity is opened at the bottom end of the sliding block, a spring is fixedly connected to the top of the movable cavity, and a movable block is fixedly connected to the other end of the spring. The movable block slides in the movable cavity along the vertical direction, and a ball is embedded in the bottom of the movable block. The bottom end of the ball abuts against the outer wall of the drill rod. A displacement sensor and a signal transmitter are also provided on the movable block.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention utilizes a lathe, a turning part, a cooling part, a positioning part and a detection part to realize turning of the drill rod and also to detect the straightness of the drill rod, and is convenient for later marking and fixed-point straightening operations, thereby helping to ensure the quality of the drill rod.

[0019] The present invention utilizes the synchronous drive in the positioning member to realize that a plurality of rotating wheels can slide and press against the drill rod, and can perform turning operations on drill rods of different diameters in cooperation with the driving member.

[0020] The present invention utilizes the linkage cooperation of the detection member and the positioning member to realize adaptive straightness detection while turning the drill rod, thereby effectively ensuring the accuracy of the drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the overall structure of a high-precision turning processing equipment for ultra-deep well drill pipes provided in Example 1 of the present invention; Figure 2A schematic diagram of the top view of the turning processing equipment proposed by the present invention; Figure 3 This is a schematic structural diagram of the inlet direction of the turning processing equipment proposed by the present invention; Figure 4 A schematic diagram of the structure of the positioning member, the driving member and the detecting member of the turning processing equipment proposed by the present invention; Figure 5 A schematic diagram of a partial cross-sectional structure of a positioning member of a turning processing equipment proposed by the present invention; Figure 6 This is a schematic diagram of the internal connection state structure of the positioning member of the turning processing equipment proposed by the present invention; Figure 7 For the present invention Figure 4 A schematic diagram of the structure enlargement at the center A; Figure 8 For the present invention Figure 5 A schematic diagram of the structure enlarged at B in the middle; Fig. 9 For the present invention Figure 6 Enlarged schematic diagram of the structure at C in the middle.

[0022] Description of main symbols: 1. Base; 2. Operation box 1; 3. Operation box 2; 4. Horizontal plate; 5. Positioning plate; 6. Hydraulic rod 1; 7. Support rod; 8. Sliding frame; 9. Positioning block; 10. Hole; 11. Rotary groove; 12. Rotating block; 13. Inner gear ring; 14. Positioning sleeve; 15. Rotating shaft; 16. Gear 1; 17. Gear 2; 18. Vertical bar; 19. Slide; 20. Rack plate; 21. Rotating wheel; 22. Rotating rod 1; 23. Sliding sleeve; 24. Sliding rod; 25. Sliding block; 26. Bump; 27. Movable cavity; 28. Movable block; 29. ​​Ball; 30. Spring; 31. Rotating rod 2; 32. Guide groove; 33. Hydraulic rod 2; 34. Connecting plate. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0024] Example 1: Please combine Figure 1-Figure 6 as well as Figure 8 and Fig. 9 The high-precision turning processing equipment for ultra-deep well drill pipes of this embodiment includes a lathe, an abutment assembly, a positioning part, a driving part, a turning part, a cooling part and a detection part.

[0025] Among them, there are two positioning parts slidingly connected along the length direction of the lathe, the two positioning parts are used to clamp the drill rod, and a driving part is arranged in the middle of the lathe to drive the positioned drill rod to rotate. Turning parts and cooling parts are respectively arranged at both ends of the lathe, and a detection part is arranged between the two positioning parts.

[0026] Abutment components, a plurality of abutment components are provided and circumferentially distributed on the outside of the drill rod, and the abutment components can abut against the annular outer wall of the drill rod to rotate synchronously with the drill rod.

[0027] When the abutment assembly rotates, the detection member is driven to slide along the length direction of the drill rod to detect the straightness of the outer wall of the drill rod.

[0028] The lathe includes a base 1, with an operation box 1 2 and an operation box 2 3 respectively provided on both sides of the base 1. The longitudinal section of the base 1 is U-shaped, and the top of the base 1 is arranged to be bent outward. A cross plate 4 is fixedly connected to one side of the upper part of the base 1, and the two sides of the cross plate 4 are respectively connected to the operation box 1 2 and the operation box 2 3, wherein one side of the operation box 1 2 and the operation box 2 3 are opened with a circular hole, and the two circular holes are coaxially arranged. A conveying device is arranged outside the operation box 1 2 to convey the drill rod. Specifically, the conveying device is used to convey the drill rod into the lathe and output the drill rod after processing.

[0029] The driving member includes a positioning plate 5, which is fixed to the middle of the base 1. A hydraulic rod 6 is fixed to the top of the positioning plate 5. A support rod 7 is connected to the top of the hydraulic rod 6. A driving wheel is installed at the end of the support rod 7 to drive the drill rod to rotate.

[0030] The turning part includes a telescopic rod, a fixing part and a turning cutter head. The telescopic rod is fixedly connected to the base 1, and the top end is connected to the fixing part. The fixing part is fixedly connected to the turning cutter head. The turning cutter heads on both sides are respectively located at the inner and outer sides of the two ends of the drill rod.

[0031] The cooling part includes a cutting fluid container and a conveyor, and the conveyor is fixed at the operation box 1 2 and the operation box 2 3 respectively. Specifically, the cutting fluid container includes a storage tank, a buffer box, a liquid level meter and other components. The cutting fluid is automatically replenished by a pump body, and a spiral mixer is used to maintain a uniform concentration to prevent precipitation. The conveyor is a hydraulic device to achieve position control of the turned parts. The cutting fluid can fall into the base 1 for collection.

[0032] The positioning member includes a sliding frame 8, a positioning block 9 is fixedly connected to the middle of the sliding frame 8, a circular through hole is opened in the middle of the positioning block 9, and the two sides of the bottom of the sliding frame 8 are slidably connected to the two sides of the top of the base 1. Specifically, a pneumatic limiter is provided at the sliding connection between the sliding frame 8 and the base 1. When adjusting, the pneumatic limiter is started by a controller to release the limit of the two, and the adjustment of the sliding frame 8 is released after moving to the required position, so that the pneumatic limiter can automatically lock the sliding frame 8, wherein the sliding frame 8 slides along the length direction of the base 1, and the positioning block 9 is provided with a plurality of holes 10 along the circumference of the circular through hole, and each hole 1 0 are arranged along the radial direction of the circular through hole, and the number of holes 10 is at least three, one end of the hole 10 is coaxially connected to a sleeve, and one of the holes 10 is arranged above the positioning block 9, each hole 10 is fixedly connected with a vertical bar 18, and the vertical bar 18 is parallel to the center line of the hole, a slide 19 is arranged in the hole, and a side groove connected to the vertical bar 18 is opened on the side wall of the slide 19. Specifically, the connection between each slide 19 and the vertical bar 18 is lubricated, and the inner end of each slide 19 is rotatably connected to a rotating rod 22, and a rotating wheel 21 is coaxially fixed to the rotating rod 22, and the tread of each rotating wheel 21 can The rotary wheel 21 is able to abut against the outer wall of the drill pipe, and the rotation centerline of the rotary wheel 21 is parallel to the centerline of the drill pipe. When the drill pipe rotates, the friction between the rotary wheel 21 and the tread of the rotary wheel 21 is used to drive the rotary wheel 21 to rotate. A rotary groove 11 is provided in the positioning block 9, and the rotary groove 11 is connected to the hole. A rotary block 12 is rotatably connected in the rotary groove 11. The rotary block 12 is fixedly connected to the inner gear ring 13 on the side facing the slide 19. A plurality of positioning sleeves 14 are evenly fixedly connected in the rotary groove 11, and a rotating shaft 15 is rotatably connected in the middle of each positioning sleeve 14. A gear 16 is coaxially fixedly connected to one end of the rotating shaft 15, and the gear 16 is meshed with the inner gear ring 13. Connection, wherein the number of the positioning sleeve 14 is consistent with that of the holes, the other end of each rotating shaft 15 is coaxially fixed with a gear 2 17, one side of each gear 2 17 is meshingly connected with a rack plate 20, each rack plate 20 is fixed to the outer wall of the slide 19, and is used to drive the slide 19 to abut against the outer wall of the drill pipe, and a hydraulic rod 2 33 is fixed to the slide 19 at the top end, and a connecting plate 34 is fixed to the top of the hydraulic rod 2 33, and a slide groove is provided at the bottom end of the other side of the connecting plate 34, and a slide bar is slidably connected to the slide groove, and the slide bar is installed on the top of the cross plate, and the sliding direction of the slide bar and the slide groove is consistent with the length direction of the base.

[0033] The implementation principle of a high-precision turning processing equipment for ultra-deep well drill pipe in the embodiment of the present application is: The drill rod is input into the circular hole at the operating box 12 by using the conveying equipment, and is conveyed to the center of the positioning block 9 one by one. When the hydraulic rod 233 closest to the operating box 12 extends toward the bottom end, as the slide 19 slides toward the center of the circular through hole, the rack plate 20 is meshed with the gear 2 17, and the transmission of the rotating shaft 15, the gear 16 and the inner gear ring 13 is utilized to realize the synchronous inward sliding of each slide 19, and make a plurality of rotating wheels 21 roll and press against the outer wall of the drill rod, so that the drill rod is always in the center of turning. When the conveying equipment conveys the drill rod to the specified position, the support rod 7 is started to realize the rotation of the drill rod after positioning, and the turning parts on both sides cooperate with the cooling parts to process the drill rod.

[0034] Example 2: Combination Figure 4 , Figure 5 and Figure 7 Based on Example 1, this embodiment is further improved in that: The detection part includes two sliding sleeves 23, which are respectively installed on the outer walls of the adjacent sides of the two positioning blocks 9. The two positioning blocks 9 are symmetrically located on both sides of the support rod 7. The two sliding sleeves 23 are slidably connected with a sliding rod 24. The sliding direction of the sliding rod 24 is consistent with that of an adjacent sliding cylinder 19. The sliding rod 24 is parallel to the length direction of the drill rod. The outer wall of the sliding rod 24 is slidably connected with a sliding block 25. The outer wall of the sliding block 25 is provided with a sliding hole 1 and a sliding hole 2. The sliding hole 1 and the sliding hole 2 are arranged along the radial direction of the drill rod, and the sliding hole 1 is located outside the sliding hole 2. The sliding hole 1 is slidably connected to the sliding rod 24, and the sliding hole 2 is slidably connected to the rotating rod 21. The rotating rod 21 is parallel to the sliding rod 24 and the drill rod. The sliding hole 2 is fixed with a protrusion 26. The two ends of the rotating rod 21 are respectively fixed to the inner side of the adjacent rotating rod 1 22. When the rotating wheel 21 rotates with the drill rod, under the action of the friction between the two, the rotating wheel 21 drives the rotating rod 21 to rotate by using the rotating rod 1 22. The outer wall of the rotating rod 21 is provided with a spiral guide groove 32, and the guide groove 32 is evenly provided with peak-valley notches. The peak-valley notches are slidably connected with the protrusion 26, and the rotating wheel 21 is used to rotate the rotating rod 21. The rotating rod 21 drives the sliding block 25 to slide back and forth horizontally. The bottom of the sliding block 25 is provided with an active cavity 27. A spring 30 is fixedly connected to the top of the active cavity 27. The other end of the spring 30 is fixedly connected to a movable block 28. The movable block 28 slides in the active cavity 27 along the vertical direction. A ball 29 is embedded in the bottom of the movable block 28. The bottom end of the ball 29 abuts against the outer wall of the drill rod. The movable block 28 is also provided with a displacement sensor and a signal transmitter. Specifically, the ball 29 is always abutted against the outer wall of the drill rod under the push of the spring 30, and as the drill rod rotates, the displacement sensor and the signal transmitter are moved. When the drill rod is in motion, the ball will gradually come into full contact with the outer wall of the rotating rod. The displacement generated when the drill rod is in contact with the outer wall is recorded by the displacement sensor. The displacement is the straightness of the outer wall of the drill rod, and the obtained data result is sent to the terminal by using a signal transmitter; when the straightness of the same annular outer wall area of ​​the drill rod exceeds 0.75mm / m, the drill rod will be marked as defective, and when the overall straightness of the drill rod is lower than 0.75mm / m, it is good, so as to adjust and control the conveying equipment and convey the good / defective drill rods to the designated positions respectively.

[0035] The implementation principle of a high-precision turning processing equipment for ultra-deep well drill pipe in the embodiment of the present application is: As the drill rod rotates, the rolling contact between the drill rod and the rotating wheel 21 synchronously drives the rotating rod 1 22 and the rotating rod 21 to rotate, so that under the sliding connection between the guide groove 32 and the protrusion 26, the sliding block 25 can slide back and forth horizontally along the sliding rod 24, and as the drill rod rotates and the sliding block 25 slides back and forth horizontally, the ball 29 at the bottom will always roll and contact the outer wall of the drill rod under the elasticity of the spring 30, and the straightness of the drill rod is detected by the displacement sensor at the movable block 28. When the straightness exceeds 0.75mm / m, the current area will be located and locked, and the signal source will be transmitted to the terminal for the convenience of the operator to mark, which is conducive to subsequent positioning and processing.

[0036] Since the second rotating rod 31 slides radially with the first rotating rod 22, the sliding rod 24 at the top can slide synchronously along the sliding sleeve 23, so as to ensure that the ball 29 can adaptably detect the drill rod.

[0037] Example 3: Combination Figure 1-Figure 9 In this embodiment, a high-precision turning method for ultra-deep well drill pipe is provided, and the steps are as follows: S1. Material conveying: Use conveying equipment to convey the drill rod to be turned into the lathe; S2, receiving materials: start synchronously through the positioning parts, and realize that each slide 19 drives the rotating wheel 21 to slide inward, and finally use the tread of the rotating wheel 21 to limit the outer wall of the drill rod being transported in, and wait for the drill rod to be transported to the specified position, and then further limit the drill rod to avoid the deviation of the drill rod during the subsequent turning operation; S3, turning and testing: With the start of the driving member, the turning members on both sides process the drill rod being turned, and during the turning process, the detection member is synchronously driven to reciprocate horizontally by the contact between the rotating wheel 21 and the outer wall of the drill rod, so as to realize the straightness detection of the drill rod by the moving detection member; S4. Turning completed: The drill rods that have been turned are transported according to the good / defective classification based on the straightness test results. Defective products need to be reprocessed until they meet the good product standards.

[0038] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A high-precision turning equipment for ultra-deep well drill pipe, characterized in that: include: A lathe, wherein two positioning members are slidably connected in the length direction of the lathe, a drill rod is clamped between the two positioning members, a driving member is arranged in the middle of the lathe, and is used to drive the drill rod to rotate, a turning member and a cooling member are arranged at both ends of the lathe, and a detection member is arranged between the two positioning members; Abutment components, a plurality of abutment components are provided and circumferentially distributed outside the drill pipe, and the abutment components can abut against the annular outer wall of the drill pipe to rotate synchronously with the drill pipe; Wherein: when the abutment assembly rotates, the detection member is driven to slide along the length direction of the drill rod to detect the straightness of the outer wall of the drill rod.

2. A high-precision turning equipment for ultra-deep well drill pipe according to claim 1, characterized in that: The lathe includes a base, with an operating box 1 and an operating box 2 respectively provided on both sides of the base. The longitudinal section of the base is U-shaped, and the top of the base is bent outward. A horizontal plate is fixedly connected to one side above the base, and the two sides of the horizontal plate are respectively connected to the operating box 1 and the operating box 2. Circular holes are opened on one side of the operating box 1 and the operating box 2, and the two circular holes are coaxially arranged. A conveying device is arranged outside the operating box 1 to convey the drill rod.

3. The high-precision turning equipment for ultra-deep well drill pipe according to claim 1, characterized in that: The driving member includes a positioning plate, which is fixed to the middle of the base. A hydraulic rod 1 is fixedly connected to the top of the positioning plate. A support rod is connected to the top of the hydraulic rod 1. A driving wheel is installed at the end of the support rod for driving the drill rod to rotate.

4. The high-precision turning equipment for ultra-deep well drill pipe according to claim 1, characterized in that: The positioning member includes a sliding frame, a positioning block is fixedly connected to the middle of the sliding frame, a circular through hole is opened in the middle of the positioning block, and the two sides of the bottom end of the sliding frame are slidably connected to the two sides of the top end of the base, the sliding frame slides along the length direction of the base, and the positioning block has a plurality of holes opened along the circumference of the circular through hole, each hole is arranged radially along the circular through hole, and the number of holes is at least three, one end of the hole is coaxially connected to a sleeve, and one of the holes is arranged above the positioning block.

5. The high-precision turning equipment for ultra-deep well drill pipe according to claim 4, characterized in that: A vertical bar is fixedly connected in each of the holes, and the vertical bar is parallel to the center line of the hole. A slide tube is provided in the hole, and a side groove which is slidably connected to the vertical bar is opened on the side wall of the slide tube. A rotating rod is rotatably connected to the inner end of each slide tube, and a rotating wheel is coaxially fixed on the rotating rod. The tread of each rotating wheel can abut against the outer wall of the drill rod, and the rotation center line of the rotating wheel is parallel to the center line of the drill rod. When the drill rod rotates, the friction between it and the tire tread of the rotating wheel is used to drive the rotating wheel to rotate.

6. The high-precision turning equipment for ultra-deep well drill pipe according to claim 4, characterized in that: A rotary groove is provided in the positioning block, and the rotary groove is connected to the hole, a rotating block is rotatably connected in the rotary groove, an inner gear ring is fixedly connected to the rotating block facing the side of the slide cylinder, a plurality of positioning sleeves are evenly and fixedly connected in the rotary groove, and a rotating shaft is rotatably connected to the middle part of each positioning sleeve, one end of the rotating shaft is coaxially fixed with gear 1, the gear 1 is meshingly connected to the inner gear ring, the number of positioning sleeves is the same as the number of holes, the other end of each rotating shaft is coaxially fixed with gear 2, one side of each gear 2 is meshingly connected with a rack plate, each rack plate is fixed to the outer wall of the slide cylinder, and is used to drive the slide cylinder to abut against the outer wall of the drill rod.

7. The high-precision turning equipment for ultra-deep well drill pipe according to claim 6, characterized in that: A hydraulic rod 2 is fixedly connected to the slide cylinder at the top, a connecting plate is fixedly connected to the top of the hydraulic rod 2, a sliding groove is provided at the bottom end of the other side of the connecting plate, a sliding bar is slidably connected to the sliding groove, the sliding bar is installed on the top of the cross plate, and the sliding direction of the sliding bar and the sliding groove is parallel to the length direction of the base.

8. The high-precision turning equipment for ultra-deep well drill pipe according to claim 1, characterized in that: Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

9. The high-precision turning equipment for ultra-deep well drill pipe according to claim 8, characterized in that: A movable cavity is provided at the bottom end of the sliding block, a spring is fixedly connected to the top of the movable cavity, a movable block is fixedly connected to the other end of the spring, the movable block is slidably arranged in the movable cavity along the vertical direction, a ball is embedded in the bottom of the movable block, the bottom end of the ball is in contact with the outer wall of the drill rod, and a displacement sensor and a signal transmitter are also provided on the movable block.

10. A high-precision turning method for ultra-deep well drill pipe, characterized in that: The method uses a high-precision turning processing equipment for ultra-deep well drill pipes as described in any one of claims 1 to 9, and the steps are as follows: S1. Material transportation: Use the conveying equipment to transport the drill rod into the lathe; S2. Receive materials: receive and limit the drill pipe through the positioning piece; S3, Turning and testing: Use turning parts to process the drill rod, and simultaneously test the straightness of the drill rod during the turning process; S4. Unloading: The drill rods that have been turned are transported according to the good / defective classification based on the straightness test results.

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